161281479 has 4 divisors (see below), whose sum is σ = 215041976. Its totient is φ = 107520984.

The previous prime is 161281459. The next prime is 161281501. The reversal of 161281479 is 974182161.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 161281479 - 2⁵ = 161281447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161281429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26880244 + ... + 26880249.

It is an arithmetic number, because the mean of its divisors is an integer number (53760494).

Almost surely, 2^161281479 is an apocalyptic number.

161281479 is a deficient number, since it is larger than the sum of its proper divisors (53760497).

161281479 is an equidigital number, since it uses as much as digits as its factorization.

161281479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53760496.

The product of its digits is 24192, while the sum is 39.

The square root of 161281479 is about 12699.6645231282. The cubic root of 161281479 is about 544.3290331687.

The spelling of 161281479 in words is "one hundred sixty-one million, two hundred eighty-one thousand, four hundred seventy-nine".